Weil-McLain CER Series 2, Installation Instructions Manual

Page: 7 / 15

Part number 550-141-402/0801 7
CER Series 2 Electric-Hydronic Boilers Installation Instructions
Wiring
continued
G
OR RD
(Note 5)
BK
To
FUSES
To
CIRCULA
TOR
(Note 6)
120 V
AC (for cir
culator)
EQUIPMENT GROUND
SERVICE SWITCH
H N
WIRE NUTS WIRE NUTS
Schematic
Wir
ing Diag
ra
m
THERMOST
AT
OR END SWITCH (Note 1)
P
a
rt
Number
550-224-720/0801
CER
Ser
ies 2
24 KW thr
u 40 KW
208, 240 or 480
V
A
C/3-phase/60 hz
2
½
min.
ON, 15 sec.
OFF
Legend
HIGH VOL
TAGE FACTOR
Y WIRING
LOW VOLTAGE FACTOR
Y WIRING
HIGH VOL
TAGE FIELD WIRING
LOW VOLTAGE FIELD WIRING
A United Dominion Compan
y
W
eil-McLain
• 500 Blaine St.
• Michigan City
, IN 46360-2388
Items not provided
Electrical shock hazard
—
can cause
severe injur
y or death. Disconnect
power before installing or ser
vicing.
1.Thermostat heat anticipator setting must be 0.5 amps. 2.All wiring must be installed in accordance with the requirements of the National Electrical Code and any
applicable national, state or local code requirements.
3.All safety cir
cuit wiring must be N.E.C. Class 1.
4.Use only copper conductors for power input wiring. Do not use aluminum conductors. 5.For 208-volt power supply
, remove orange wire and replace with red wire.
6.Maximum cir
culator motor is 1/6 horsepower
.
1C 2C 4C
TD1
ED1 ED2 ED3 ED4
CONT
ACTORS
THERMAL TIME DELA
Y RELA
YS
ELECTRONIC
TIME DELA
Y RELA
YS
HEA
TING
ELEMENTS
1K1
1K
TD2 TD3 TD4
H1 H2 H3 H4
2K1
2K 3K 4K 5K 6K
3K1 4K1 5K1 6K1 2K2 3K2 4K2 5K2 6K2 2K3 3K3 4K3 5K3 6K3
1 1 1
3 3 3 3
1
R B
R
R
R
B
B
B
4 2
3 1
3C
L1
2K1 2K2 2K3 3K1 3K2 3K3 4K1 4K2 4K3 5K1 5K2 5K3 6K1 6K2 6K3
To
:
L2 L3
To
CIRCULA
TOR
(Note 6)
120 V
AC (for cir
culator)
(208, 240 or 480 V
AC)
SERVICE
SWITCH
H
N
G
THERMOST
A
T
THERMOST
AT
TRANSFORMERTRANSFORMER
TRANSFORMERTRANSFORMER
24 V
A
C
24 V
A
C
HIGH LIMIT HIGH LIMIT
LOW LIMIT LOW LIMIT
THERMAL TIME
DELA
Y RELA
YS
THERMAL TIME
DELA
Y RELA
YS
ELECTRONIC TIME
DELA
Y RELA
YS
ELECTRONIC TIME
DELA
Y RELA
YS
Ladder
Wir
ing Diag
ra
m
EQUIPMENT
GROUND
(Note 1)
F1 F2 F3 F4 F5
2K1 3K1 4K1 5K1
1K 2K 3K
ED1 ED2 ED3 ED4
1C 2C 3C 4C
4K 5K 6K H1 H2 H3 H4
6K1
2K2 3K2 4K2 5K2 6K2
F6 F7 F8 F9 F10
2K3 3K3 4K3 5K3 6K3
F11 F12 F13 F14 F15
L1
L2
L3
1K1
HIGH LIMIT HIGH LIMIT
LOW LIMIT LOW LIMIT
CIRCULA
TOR RELA
Y
CIRCULA
TOR RELA
Y
HEA
TING
ELEMENTS